Dhanalakshmi College of Engineering

www.dce.edu.in/
Chennai, India
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Chellappan M.,Dhanalakshmi College of Engineering | Sathiya P.,Indian National Institute of Engineering
Materials Today: Proceedings | Year: 2017

This study focuses on the optimization of process parameters in Tungsten inert gas welding (TIG) of supermartensitic stainless steel using Technique for Order Preference by Similarity to Ideal Solution Method (TOPSIS). Supermartensitic stainless steels are the best alternative to high-strength low-alloy steels which are mainly used in the applications related to the gasoline industry. Bead on plate TIG welding was performed based on taguchi L9 orthogonal array.The input process parameters considered for this work were current, voltage, travel speed, and shielding gas flow rate. The quality of the weld was analysed by measuring the bead width, depth of penetration and hardness of the weld. Multiobjective performance characteristics were optimised using TOPSIS. The Metallographic investigations for the best and worst weld with respect to bead geometry, hardness were also done. The end results of experimental investigation have proved that the weld quality can be enhanced effectively with the aid of the above said approach. © 2017 Elsevier Ltd.


Noorjahan M.,Dhanalakshmi College of Engineering | Suruthi S.,Dhanalakshmi College of Engineering
Proceedings of 2016 Online International Conference on Green Engineering and Technologies, IC-GET 2016 | Year: 2017

The proposed antenna mainly used for wireless applications. The size of the antenna is 28 × 28.5 × 0.635 mm3. Low dielectric loss substrate material used for the antenna design. Antenna consists of circular radiator and is fed by CPW feeding line. Proposed antennas have operational bands covering 1.8GHz and 5.8 GHZ. The antenna have good omni directional radiation pattern. The antenna suitable for Wireless Local Area Network (WLAN), Worldwide Interoperability for Microwave Access (WiMAX) applications. © 2016 IEEE.


Anoop N.A.,Dhanalakshmi College of Engineering | Parani T.K.,Dhanalakshmi College of Engineering
Proceedings of 2016 Online International Conference on Green Engineering and Technologies, IC-GET 2016 | Year: 2017

Wearable health-monitoring system is a leading technology, especially in enabling the non-invasive diagnosis of vital functions of the human body. The combined information obtained from such systems can either be relayed directly to any health-monitoring organization in the case of crises or can be logged and analyzed as a part of preventive health measures. With the increasing population density it is difficult to have a real time tracking of health condition of people in an area. Traditional offline method such as using medical survey and making medical records manually are inefficient. In this project hardware for continuous health monitoring and alert system is developed. Different sensors are used to measure various parameters from human body. Reading taken from ECG is huge and is hard to handle, so a compression algorithm is used to compress the readings taken from patient's body. To ensure the security and privacy of patient's health status it is critical to secure the data collected from the person's body, for this we are using Knapsack cryptography algorithm. The encrypted data is then uploaded to the website. With this system the doctor can have access to patient's data from anywhere. The main aim of this project is to setup a virtual hospital with limited resource. © 2016 IEEE.


Denceli D.,Dhanalakshmi College of Engineering | Yogeshwaran A.,Dhanalakshmi College of Engineering
Proceedings of 2016 Online International Conference on Green Engineering and Technologies, IC-GET 2016 | Year: 2017

A split ring resonator metamaterial antenna for WiMax/WLAN applications was proposed in this paper. Antenna 1 takes a spit ring resonator as its radiator fed by a coplanar waveguide (CPW). Antenna 1 covers the frequency range of 1.7-1.8GHz which is used for WiMax applications. Antenna 2 is further developed, which adds a complementary spit ring resonator on the ground, and the improved design has a good impedance matching and covers the frequency range of 5.8 GHz which is used for WLAN applications. The proposed two metamaterials antennas have the advantages of simple design, miniaturization and compactness, which can be applied to wireless communication system. © 2016 IEEE.


Nandan P.,Dhanalakshmi College of Engineering | Johny G.K.,Dhanalakshmi College of Engineering
Proceedings of 2016 Online International Conference on Green Engineering and Technologies, IC-GET 2016 | Year: 2017

Water resource monitoring is very essential in recent years since many factors pollute the water resource and ecosystems, now they are facing increasing threats. Surface gliders are small, reusable autonomous underwater vehicles designed to glide through the water surface while measuring pH, oil spill and other parameters. Here it deals with an accuracy-aware diffusion process using surface gliders. In practical application, the global positions of the robots can be accurately measured but it may be unstable in some area were there were no GPS coverage's to avoid this problem we introduce a new method to track the surface gliders which The gliders are used to measure the water quality that is unable to protect itself from damage. The data provided by the surface gliders enable the experts to identify the prefer ability of the water resource. In the proposed methodology the surface robot measure collaboratively the characteristics of aquatic diffusion process including source location, amount of substance, and its change over time The data is updated in real time environment. At various points of time the pollutant level in a selected location can be analyzed. The simulations based on real data traces of GPS localization errors, sea gliders, and wireless communication. The results show that this approach can accurately measure the environmental changes under tight energy budgets. © 2016 IEEE.


Selvakumar N.,Mepco Schlenk Engineering College, Sivakasi | Jeyasubramanian K.,Mepco Schlenk Engineering College, Sivakasi | Sharmila R.,Dhanalakshmi College of Engineering
Progress in Organic Coatings | Year: 2012

Nano containers with a shell possessing controlled release properties can be used to fabricate a new family of active coatings that can respond quickly to change the environment/integrity of the coatings. The release of corrosion inhibitors encapsulated within nano containers can prevent further corrosion. The structural evolutions and morphological characteristics of nano particles are investigated using XRD, SEM, FT-IR and AFM. The author reports an in situ encapsulation method demonstrating over an order of magnitude size reduction for the preparation of urea-formaldehyde capsules filled with a healing agent, linseed oil and corrosion inhibitors. Capsules with diameters as small as 30-40 μm are achieved using stirring techniques. Cracks in paint film were successfully healed when linseed oil and nanoparticles was released from microcapsules ruptured under stimulated mechanical action. Further linseed oil healed area was found to prevent corrosion of the substrate. © 2012 Elsevier B.V. All rights reserved.


Chithambaram V.,Dhanalakshmi College of Engineering | Krishnan S.,B.S. Abdur Rahman University
Optics and Laser Technology | Year: 2014

Urea Zinc Acetate (UZA), a novel semi organic nonlinear optical crystal having dimensions 30×28×10 mm3 has been synthesized using slow evaporation technique. The lattice parameters for the grown crystals were determined using single crystal XRD. The presence of functional groups for the grown crystals was confirmed using Fourier Transform Infrared (FT-IR) spectroscopy. The optical absorption studies show that the material has wide optical transparency in the entire visible region. The thermal stability of the crystal was determined from thermo gravimetric and differential thermal analysis curve. The second harmonic generation was confirmed by Kurtz powder method and it is found to be 3 times than that of KDP crystal. © 2013 Elsevier Ltd.


Shanmugan S.,Dhanalakshmi College of Engineering
2013 International Conference on Energy Efficient Technologies for Sustainability, ICEETS 2013 | Year: 2013

A single slope single basin type solar still has been designed and fabricated. The system has been tested with dripping of saline water on cotton fin wick in the basin liner. Energy balance equations for the moist air inside the still, glass cover and fin cotton wick have been written and solved to get the analytical expressions for the instantaneous efficiency of the proposed system. The numerical calculations have been done and validated with the experimental observations for a few typical days during October 2011 and September 2012. © 2013 IEEE.


Deepa Shri S.,Dhanalakshmi College of Engineering | Thenmozhi R.,Vellore Institute of Technology
Life Science Journal | Year: 2013

In this study new mathematical models were proposed and developed by using a regression equation for the prediction of impact energy absorption of hybrid ferrocement slabs. Slabs were made up of self-compacting concrete (SCC) in order to minimize the external vibration work. Slabs of size 300 X 300 mm with varying parameters such as depth of slab (25 & 30 mm), number of layers of weld mesh (2 and 3 layers bundled), and wrapping with Glass Fiber Reinforced Polymer sheets (GFRP) (1 and 2 layers) along with a specified proportion (0 and 0.30%) of polypropylene fibers were cast. Impact load was applied by means of a hammer of weight 3.5 kg (34.335 N) and the initial and ultimate energy absorptions were evaluated. The variables used in the prediction models were the varying parameters such as number of layers of GFRP sheet, area of weld mesh and height of drop. According to the analysis, the models provide good estimation of impact energy absorption and yielded good correlations with the data used in this study.


Geerthy T.,Dhanalakshmi College of Engineering
2015 International Conference on Communication and Signal Processing, ICCSP 2015 | Year: 2015

Clinical breath analysis has been recognized for centuries, to detect the diseased state in humans. The exhaled breath consists of volatile organic compounds (VOC) which reflect the health status of an individual. Among the various gas molecules present in breath, ammonia specifically indicates the presence of pathological conditions like renal failure, gastric ulcer, liver failure etc. and hence can be used in diagnosis. Such monitoring can be done using existing techniques like Gas chromatography which involve a difficult sampling process and incur high cost. In this work, a low-cost and a less complex prototype model was developed to detect the presence of ammonia in human breath. This non-invasive technique involves a semiconductor sensor which is sensitivity to ammonia, has been calibrated and used to detect the presence of ammonia from the collected breath samples. The output generated is then interfaced to PC and finally the samples are analyzed for diagnostic applications. © 2015 IEEE.

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